Date   

Re: [Amel Yacht Owners] Amel 54 and 55 measurements

Peter Forbes
 

Eric,

I'm fairly sure that there are 39 inches in a meter. So 17.2 x 39=670.8 inches divided by 12 for feet = 55.9 feet. I'm rather old fashioned in my maths! So I guess the deck length is 55.9 feet.

Then 16.4 m is 53.3 feet - I assume that is the water line length.

But some wise men like Joel or Bill should interrupt this and tell us the actual figures?

Best wishes

Peter

Peter Forbes

07836 209730

On 22 Mar 2014, at 05:14, sailormon <kimberlite@...> wrote:

 

Peter,

Isn’t 17.2 meters 56.4 feet?

And 16.4 meters 53 feet that is the waterline?

Fair Winds

Eric

Kimberlite SM 376

 

 

 

From: amelyachtowners@... [mailto:amelyachtowners@...] On Behalf Of Peter Forbes
Sent: Friday, March 21, 2014 1:57 PM
To: amelyachtowners@...
Subject: Re: [Amel Yacht Owners] Amel 54 and 55 measurements

 

 

Eric,

 

My 54 user manual says:

 

Lh 16.4m

Bh 4.7m

Lmax 17.2m

Bmax 4.8m

 

This could mean the LWL as we Brits call it is 16.4m and the Beam at WL is 4.7.

 

Max length - deck level 17.2 - max width at widest point is 4.8m

 

I hope that helps

Peter Forbes

Carango Sailing Ketch Amel 54 #035 2006.

 

On 21 Mar 2014, at 17:03, sailormon <kimberlite@...> wrote:



 

Hi,

What is the length at the waterline of the Amel 54 and 55 and its beam?

Fair Winds

Eric

Kimberlite SM 376

 

 

 


Re: [Amel Yacht Owners] Amel 54 and 55 measurements

sailormon <kimberlite@...>
 

Peter,

Isn’t 17.2 meters 56.4 feet?

And 16.4 meters 53 feet that is the waterline?

Fair Winds

Eric

Kimberlite SM 376

 

 

 

From: amelyachtowners@... [mailto:amelyachtowners@...] On Behalf Of Peter Forbes
Sent: Friday, March 21, 2014 1:57 PM
To: amelyachtowners@...
Subject: Re: [Amel Yacht Owners] Amel 54 and 55 measurements

 

 

Eric,

 

My 54 user manual says:

 

Lh 16.4m

Bh 4.7m

Lmax 17.2m

Bmax 4.8m

 

This could mean the LWL as we Brits call it is 16.4m and the Beam at WL is 4.7.

 

Max length - deck level 17.2 - max width at widest point is 4.8m

 

I hope that helps

Peter Forbes

Carango Sailing Ketch Amel 54 #035 2006.

 

On 21 Mar 2014, at 17:03, sailormon <kimberlite@...> wrote:



 

Hi,

What is the length at the waterline of the Amel 54 and 55 and its beam?

Fair Winds

Eric

Kimberlite SM 376

 

 

 


Re: [Amel Yacht Owners] Amel 54 and 55 measurements

sailormon <kimberlite@...>
 

Peter,

Thanks.

Fair Winds

Eric

Kimberlite SM 376

 

 

From: amelyachtowners@... [mailto:amelyachtowners@...] On Behalf Of Peter Forbes
Sent: Friday, March 21, 2014 1:57 PM
To: amelyachtowners@...
Subject: Re: [Amel Yacht Owners] Amel 54 and 55 measurements

 

 

Eric,

 

My 54 user manual says:

 

Lh 16.4m

Bh 4.7m

Lmax 17.2m

Bmax 4.8m

 

This could mean the LWL as we Brits call it is 16.4m and the Beam at WL is 4.7.

 

Max length - deck level 17.2 - max width at widest point is 4.8m

 

I hope that helps

Peter Forbes

Carango Sailing Ketch Amel 54 #035 2006.

 

On 21 Mar 2014, at 17:03, sailormon <kimberlite@...> wrote:



 

Hi,

What is the length at the waterline of the Amel 54 and 55 and its beam?

Fair Winds

Eric

Kimberlite SM 376

 

 

 


Re: [Amel Yacht Owners] Amel 54 and 55 measurements

Peter Forbes
 

Eric,

My 54 user manual says:

Lh 16.4m
Bh 4.7m
Lmax 17.2m
Bmax 4.8m

This could mean the LWL as we Brits call it is 16.4m and the Beam at WL is 4.7.

Max length - deck level 17.2 - max width at widest point is 4.8m

I hope that helps
Peter Forbes
Carango Sailing Ketch Amel 54 #035 2006.

On 21 Mar 2014, at 17:03, sailormon <kimberlite@...> wrote:


Hi,

What is the length at the waterline of the Amel 54 and 55 and its beam?

Fair Winds

Eric

Kimberlite SM 376

 




Dishwasher Amel 54

Krasopoulos Dimitris <dkra@...>
 

Thank you I will check and try to solve the problem it seems that this is the source of the problem

Regards

Dimitris
Amel 54
Alma libre too

Στάλθηκε από το iPhone μου

21 Μαρ 2014, 17:56, ο/η Nefeli <smnefeli@...> έγραψε:

I do not know if the model is the same, but I had exactly the same symptoms on my SuperMaramu.

 There is a security switch to prevent the dishwasher to flood the vessel that forces the evacuation pump to work (the noise you hear) but prevents anything else to happen.

Try and check is under the dishwasher there is a recess with water accumulated (I had to extract the dishwasher on my vessel to check it, but it was not difficult). If so, get rid of the water and the problem is solved.

Fernanmdo
s/y Nefeli

On 20 Mar 2014, at 23:34, Dimitris Krassopoulos wrote:

 

The dishwasher on my Amel 54 stopped working. The panel lights turned off and I hear a pump working but the dishwasher is not working. Had somebody of the Amel 54 the same problem? Is there a solution to that?

 

Regards

 

Alma Libre Too

Amel 54

 

Dimitris Krasopoulos

Mob.6944302318



Στάλθηκε από το iPhone μου

4 Μαρ 2014, 1:15, ο/η Kent Robertson <karkauai@...> έγραψε:

 

Thanks, Ann-Sophie, that makes it clear.
Kent

From: Ann-Sofie Svanberg <kanalmamman@...>
To: "amelyachtowners@..." <amelyachtowners@...>
Sent: Monday, March 3, 2014 4:45 PM
Subject: Re: [Amel Yacht Owners] Cockpit Table
 
The U-bolt is to attach your lifeline, we have one next the the wheel as well.

You can turn the table around the pole that is attached to the rope-container (first arm), and you can swing the table around the arm that is attached to the first arm. You can not fold it, you just lift table and second arm from the first arm and stowe it away. You can remove the first arm as well if you like. If you follow the URL in y first mail, you will find the components and will understand how it works.

Oh, If I could attach pictures to the mail it would have been so much easier. But I have posted some more pictures that might enlight you. 

/Annsofie
SY Lady Annila SM 232
Skickat från min iPad
3 mar 2014 kl. 17:19 skrev "Kent Robertson" <karkauai@...>:
 
Hi, Ann-Sophie,
I'm unclear as to the mounting bracket.  Is it attached to the middle of the table so that it rotates?  Can it be locked in any position?  Can it be folded down out of the way, or must it be removed and stowed?
 
On another note, what is the U-bolt for that is attached to the line holder by the table bracket?
 
I'm also looking for some different arrangement for the cockpit table, anyone else have other ideas?
Steady as she goes.
Thanks,
Kent
SM 243
Kristy
 

From: Ann-Sofie Svanberg <kanalmamman@...>
To: "amelyachtowners@..." <amelyachtowners@...>
Sent: Monday, March 3, 2014 3:05 PM
Subject: Re: [Amel Yacht Owners] Cockpit Table
 
We have mounted a Lagun table on the outside front of the rope-container below the mizzen mast. We choosed the large table and it works perfekt. It is always up. 

You can see it on http://www.noa.se/ and choose english as language. Belive that you can buy it in USA as well.

I posted some pictures in the album Cockpit table, Extra. And you can see it in use, just finnished brakefast......

/Annsofie
SY Lady Annila, SM232

Skickat från min iPad
2 mar 2014 kl. 22:52 skrev terencesingh@...:
 
We are looking for more details on how the cockpit table on the Super Maramu 2000 that is mounted to the rear of the captains chair is constructed. The standard cockpit table that came with our SM (1997)  is too large for every day use and we are looking for an alternative.

Thanks in advance.

Terry&Dena
SV Libby # 196
San Diego


Amel 54 and 55 measurements

sailormon <kimberlite@...>
 

Hi,

What is the length at the waterline of the Amel 54 and 55 and its beam?

Fair Winds

Eric

Kimberlite SM 376

 


Re: [Amel Yacht Owners] Dometic Dishwasher DW2440- Amel54

smnefeli
 

I do not know if the model is the same, but I had exactly the same symptoms on my SuperMaramu.
 There is a security switch to prevent the dishwasher to flood the vessel that forces the evacuation pump to work (the noise you hear) but prevents anything else to happen.

Try and check is under the dishwasher there is a recess with water accumulated (I had to extract the dishwasher on my vessel to check it, but it was not difficult). If so, get rid of the water and the problem is solved.

Fernanmdo
s/y Nefeli
SM 38, currently in St. Lucia

On 20 Mar 2014, at 23:34, Dimitris Krassopoulos wrote:

 

The dishwasher on my Amel 54 stopped working. The panel lights turned off and I hear a pump working but the dishwasher is not working. Had somebody of the Amel 54 the same problem? Is there a solution to that?

 

Regards

 

Alma Libre Too

Amel 54

 

Dimitris Krasopoulos

Mob.6944302318

 




Re: [Amel Yacht Owners] Range of AIS

svperegrinus <no_reply@...>
 

This does not address the original poster's question of what happens if you use a splitter, but here's some additional data:

1.  VHF radio (with a 4' antenna on top of main mast)
This radio has an AIS built-in.  No antenna splitter, it uses the same antenna used for the voice radio.    Currently the furthest reliable signal is "Dole Chile", steaming at 25.6 miles away.

2.  Dedicated AIS on its on 4' antenna on top of mizzen
This got a fragmentary tx from "Dole Chile", but lost that signal before it could receive the actual name (only got the MMSI), and never got ROT, nor draught, etc., although bearing, SOG and position were picked up.
The furthest reliable signal is "Bimini Superfast", steaming at 23.9 miles away, a signal also picked by the VHF.

Other than antenna height, a factor could be that even though both systems use 4' antennas, the VHF has a "Shakespeare Phase III Marine Cell" (mod. 6410) antenna, whereas the AIS has a "Shakesperare Phase III Marine AIS" (mod. 6396) antenna.   But I doubt the antennas make much difference.

Net/net, mast height makes a difference, as Mark proposes.

There are 144 targets right now.

s.v. Peregrinus
SM2K #350 (2001)


Re: [Amel Yacht Owners] Range of AIS

sailormon <kimberlite@...>
 

Mark,

It shouldn’t work at that range as you stated, but it does—I guess we are using the force !

Fair Winds

Eric

 

 

From: amelyachtowners@... [mailto:amelyachtowners@...] On Behalf Of Mark Erdos
Sent: Thursday, March 20, 2014 9:14 PM
To: amelyachtowners@...
Subject: RE: [Amel Yacht Owners] Range of AIS

 

 

Eric,

 

I can’t explain the anomalies. I can just elucidate the theory.

 

Best regards,

 

Mark

 

SM2K #275

www.creampuff.us

 

 

 

From: amelyachtowners@... [mailto:amelyachtowners@...] On Behalf Of sailormon
Sent: Thursday, March 20, 2014 8:06 PM
To: amelyachtowners@...
Subject: [Amel Yacht Owners] Range of AIS

 

 

Mark,

I have frequently received AIS from ships over 50 miles away.

One time as I was rounding Montauk point I was able to read ships anchored outside Manhattan. Over 100 miles.

I believe this is due to the fact that many of these ships AIS antennas are over 100 feet above the water.

 

With respect to the transmission of class B AIS , I believe it is only 5 watts as the class A is 25 watts. Many times I see ships but they only see me at about 5-6 miles. When I feel rich, I will buy a class A unit.

Fair Winds

Eric

Kimberlite SM 376

 

 

 

From: amelyachtowners@... [mailto:amelyachtowners@...] On Behalf Of Mark Erdos
Sent: Thursday, March 20, 2014 10:09 AM
To: amelyachtowners@...
Subject: RE: [Amel Yacht Owners] ais antenna

 

 

Mark,

I think you need to check your AIS. If you are showing vessels 50-100nm away, these are most likely ghost images or images where you have not received a transmission for quite some time. The should not be on the screen. The AIS works on a VHF frequency. This is a direct line of sight transmission. Meaning, that both the transmitting antenna and the receiving antenna need to “see” each other. Due to the curvature of the earth this limits the transmission range. The maximum range of a VHF transmission is 25 nm.

The range in nautical miles - that is, how far your radio can 'see' to the horizon is equal to 1.23 times the square root of the height of your antenna in feet.

http://www.frugal-mariner.com/images/Range2.png

So if, for instance your antenna height is 60 feet, the distance it can transmit before it runs into the horizon is ~ 9.5 nautical miles. ( the square root of 60 = 7.74. Multiply that times 1.23 to come up with approximately 9.5.)

Now, keep in mind, the vessel to which you are transmitting also has his antenna above the water. So, let's assume, for example, his antenna is 18 feet above the water. He can transmit about 5.2 miles. You can add your range to his to come up with 14.7 nautical miles.

A land based station is usually much higher. An antenna on a hill on a tower might be very high, but for argument's sake, let's say it's 400 feet. So theoretically, he can transmit 24.6 miles. Add that to your 9.5 miles and you have about 34.1 nautical miles.

This seems to exceed the roughly 25 mile maximum range limit. Well, many other factors come in to play here. The first of which is the rapidly diminishing strength of the transmitted signal with distance. The power density of an electromagnetic wave is proportional to the inverse of the square of the distance from the source. So, for every 4 miles your signal travels, its strength is reduced by a factor of 16. It won't take too long for that 25 watt signal to reduce itself to next to nothing.

Best regards,

Mark

SM2K #275

www.creampuff.us

From: amelyachtowners@... [mailto:amelyachtowners@...] On Behalf Of markghayden@...
Sent: Thursday, March 20, 2014 9:56 AM
To: amelyachtowners@...
Subject: Re: [Amel Yacht Owners] ais antenna

Several years ago we installed AIS on Northfork. We initially used the existing AM/FM antenna and a year later had a VHF antenna that was designed for use with AIS professionally installed on the top of the main mast with a new run of coax to our nav station.

The difference was dramatic. The range increased from 10nm (with AM/FM antenna) to 50-100nm (with VHF/AIS antenna).

best, Mark

SM2K #331

On Thu, Mar 20, 2014 at 12:31 PM, <sailw32@...> wrote:

When I bought a Garmin AIS 600 ,I was told by the salesmen at the GPS store as well as a Garmin rep. that I should install a separate antenna . Now that I am ready to install it on top of the mizzen mast and thinking of the difficulty of the install, I am questioning if its worth the effort and the cost of the antenna. Putting a splitter into the vfh would be much easier. My question is for those that have a splitter , do you have a good AIS signal and is there any reason to have a separate antenna ?

  ; Thanks, Pat SM #123


Re: [Amel Yacht Owners] Range of AIS

Mark Erdos
 

Eric,

 

I can’t explain the anomalies. I can just elucidate the theory.

 

Best regards,

 

Mark

 

SM2K #275

www.creampuff.us

 

 

 

From: amelyachtowners@... [mailto:amelyachtowners@...] On Behalf Of sailormon
Sent: Thursday, March 20, 2014 8:06 PM
To: amelyachtowners@...
Subject: [Amel Yacht Owners] Range of AIS

 

 

Mark,

I have frequently received AIS from ships over 50 miles away.

One time as I was rounding Montauk point I was able to read ships anchored outside Manhattan. Over 100 miles.

I believe this is due to the fact that many of these ships AIS antennas are over 100 feet above the water.

 

With respect to the transmission of class B AIS , I believe it is only 5 watts as the class A is 25 watts. Many times I see ships but they only see me at about 5-6 miles. When I feel rich, I will buy a class A unit.

Fair Winds

Eric

Kimberlite SM 376

 

 

 

From: amelyachtowners@... [mailto:amelyachtowners@...] On Behalf Of Mark Erdos
Sent: Thursday, March 20, 2014 10:09 AM
To: amelyachtowners@...
Subject: RE: [Amel Yacht Owners] ais antenna

 

 

Mark,

I think you need to check your AIS. If you are showing vessels 50-100nm away, these are most likely ghost images or images where you have not received a transmission for quite some time. The should not be on the screen. The AIS works on a VHF frequency. This is a direct line of sight transmission. Meaning, that both the transmitting antenna and the receiving antenna need to “see” each other. Due to the curvature of the earth this limits the transmission range. The maximum range of a VHF transmission is 25 nm.

The range in nautical miles - that is, how far your radio can 'see' to the horizon is equal to 1.23 times the square root of the height of your antenna in feet.

http://www.frugal-mariner.com/images/Range2.png

So if, for instance your antenna height is 60 feet, the distance it can transmit before it runs into the horizon is ~ 9.5 nautical miles. ( the square root of 60 = 7.74. Multiply that times 1.23 to come up with approximately 9.5.)

Now, keep in mind, the vessel to which you are transmitting also has his antenna above the water. So, let's assume, for example, his antenna is 18 feet above the water. He can transmit about 5.2 miles. You can add your range to his to come up with 14.7 nautical miles.

A land based station is usually much higher. An antenna on a hill on a tower might be very high, but for argument's sake, let's say it's 400 feet. So theoretically, he can transmit 24.6 miles. Add that to your 9.5 miles and you have about 34.1 nautical miles.

This seems to exceed the roughly 25 mile maximum range limit. Well, many other factors come in to play here. The first of which is the rapidly diminishing strength of the transmitted signal with distance. The power density of an electromagnetic wave is proportional to the inverse of the square of the distance from the source. So, for every 4 miles your signal travels, its strength is reduced by a factor of 16. It won't take too long for that 25 watt signal to reduce itself to next to nothing.

Best regards,

Mark

SM2K #275

www.creampuff.us

From: amelyachtowners@... [mailto:amelyachtowners@...] On Behalf Of markghayden@...
Sent: Thursday, March 20, 2014 9:56 AM
To: amelyachtowners@...
Subject: Re: [Amel Yacht Owners] ais antenna

Several years ago we installed AIS on Northfork. We initially used the existing AM/FM antenna and a year later had a VHF antenna that was designed for use with AIS professionally installed on the top of the main mast with a new run of coax to our nav station.

The difference was dramatic. The range increased from 10nm (with AM/FM antenna) to 50-100nm (with VHF/AIS antenna).

best, Mark

SM2K #331

On Thu, Mar 20, 2014 at 12:31 PM, <sailw32@...> wrote:

When I bought a Garmin AIS 600 ,I was told by the salesmen at the GPS store as well as a Garmin rep. that I should install a separate antenna . Now that I am ready to install it on top of the mizzen mast and thinking of the difficulty of the install, I am questioning if its worth the effort and the cost of the antenna. Putting a splitter into the vfh would be much easier. My question is for those that have a splitter , do you have a good AIS signal and is there any reason to have a separate antenna ?

  ; Thanks, Pat SM #123

[Non-text portions of this message have been removed]


Re: [Amel Yacht Owners] ais antenna

sailormon <kimberlite@...>
 

Pat,

As I stated in my previous note. There is already a hole in the top of the mast. I just had to enlarge it with a stepped drill bit

Here is a link.  http://www.mcmaster.com/#standard-drill-bits/=r6km9m

Scroll down to see the multi diameter step  drill bit.—they are very handy to have on board.

 

It took a minute to enlarge the hole so I could fit a double female coax connector in the hole. Then I added a few nuts to the coax fitting to hold it in place.

All you then have to do is screw the antenna into the top and the coax into the bottom.

DONE !.

Fair Winds

Eric

Kimberlite SM 376

 

 

 

 

 

From: amelyachtowners@... [mailto:amelyachtowners@...] On Behalf Of Patrick Mcaneny
Sent: Thursday, March 20, 2014 8:41 PM
To: amelyachtowners@...
Subject: Re: [Amel Yacht Owners] ais antenna

 

 

 

Eric, Did you install an antenna mount on the top of the mast or a mount on the side near the top. I am not looking forward  to trying to drill and tap and screw a mount on the top. Thinking I may first install a couple of mast steps , just to get high enough. A side mount would be much easier. Thanks Pat

 

-----Original Message-----
From: sailormon
To: amelyachtowners
Sent: Thu, Mar 20, 2014 7:54 pm
Subject: RE: [Amel Yacht Owners] ais antenna

 

There is a hole in the top of the mizzen.

You only have to enlarge it a bit with a speedi bit.

After we mounted the antenna it took us ½ an hour to get the coax to the nav station.

Down the mast, out in the aft head. Remove the board above the doorway in the aft cabin and then into the ceiling above the mid ships bunk. Down in the forward cabinet in the mid ships cabin and into the Nav station.

Fair Winds

Eric

Kimberlite SM 376

 

 

From: amelyachtowners@... [mailto:amelyachtowners@...] On Behalf Of sailw32@...
Sent: Thursday, March 20, 2014 8:32 AM
To: amelyachtowners@...
Subject: [Amel Yacht Owners] ais antenna

 

 

When I bought a Garmin AIS 600 ,I was told by the salesmen at the GPS store as well as a Garmin rep. that I should install a separate antenna . Now that I am ready to install it on top of the mizzen mast and thinking of the difficulty of the install, I am questioning if its worth the effort and the cost of the antenna. Putting a splitter into the vfh would be much easier. My question  is for those that have a splitter , do you have a good AIS signal and is there any reason to have a separate antenna ?

                                                                                                Thanks, Pat SM #123


Re: [Amel Yacht Owners] ais antenna

Patrick McAneny
 


Eric, Did you install an antenna mount on the top of the mast or a mount on the side near the top. I am not looking forward  to trying to drill and tap and screw a mount on the top. Thinking I may first install a couple of mast steps , just to get high enough. A side mount would be much easier. Thanks Pat

-----Original Message-----
From: sailormon
To: amelyachtowners
Sent: Thu, Mar 20, 2014 7:54 pm
Subject: RE: [Amel Yacht Owners] ais antenna

 
There is a hole in the top of the mizzen.
You only have to enlarge it a bit with a speedi bit.
After we mounted the antenna it took us ½ an hour to get the coax to the nav station.
Down the mast, out in the aft head. Remove the board above the doorway in the aft cabin and then into the ceiling above the mid ships bunk. Down in the forward cabinet in the mid ships cabin and into the Nav station.
Fair Winds
Eric
Kimberlite SM 376
 
 
From: amelyachtowners@... [mailto:amelyachtowners@...] On Behalf Of sailw32@...
Sent: Thursday, March 20, 2014 8:32 AM
To: amelyachtowners@...
Subject: [Amel Yacht Owners] ais antenna
 
 
When I bought a Garmin AIS 600 ,I was told by the salesmen at the GPS store as well as a Garmin rep. that I should install a separate antenna . Now that I am ready to install it on top of the mizzen mast and thinking of the difficulty of the install, I am questioning if its worth the effort and the cost of the antenna. Putting a splitter into the vfh would be much easier. My question  is for those that have a splitter , do you have a good AIS signal and is there any reason to have a separate antenna ?
                                                                                                Thanks, Pat SM #123


Range of AIS

sailormon <kimberlite@...>
 

Mark,

I have frequently received AIS from ships over 50 miles away.

One time as I was rounding Montauk point I was able to read ships anchored outside Manhattan. Over 100 miles.

I believe this is due to the fact that many of these ships AIS antennas are over 100 feet above the water.

 

With respect to the transmission of class B AIS , I believe it is only 5 watts as the class A is 25 watts. Many times I see ships but they only see me at about 5-6 miles. When I feel rich, I will buy a class A unit.

Fair Winds

Eric

Kimberlite SM 376

 

 

 

From: amelyachtowners@... [mailto:amelyachtowners@...] On Behalf Of Mark Erdos
Sent: Thursday, March 20, 2014 10:09 AM
To: amelyachtowners@...
Subject: RE: [Amel Yacht Owners] ais antenna

 

 

Mark,

I think you need to check your AIS. If you are showing vessels 50-100nm away, these are most likely ghost images or images where you have not received a transmission for quite some time. The should not be on the screen. The AIS works on a VHF frequency. This is a direct line of sight transmission. Meaning, that both the transmitting antenna and the receiving antenna need to “see” each other. Due to the curvature of the earth this limits the transmission range. The maximum range of a VHF transmission is 25 nm.

The range in nautical miles - that is, how far your radio can 'see' to the horizon is equal to 1.23 times the square root of the height of your antenna in feet.

http://www.frugal-mariner.com/images/Range2.png

So if, for instance your antenna height is 60 feet, the distance it can transmit before it runs into the horizon is ~ 9.5 nautical miles. ( the square root of 60 = 7.74. Multiply that times 1.23 to come up with approximately 9.5.)

Now, keep in mind, the vessel to which you are transmitting also has his antenna above the water. So, let's assume, for example, his antenna is 18 feet above the water. He can transmit about 5.2 miles. You can add your range to his to come up with 14.7 nautical miles.

A land based station is usually much higher. An antenna on a hill on a tower might be very high, but for argument's sake, let's say it's 400 feet. So theoretically, he can transmit 24.6 miles. Add that to your 9.5 miles and you have about 34.1 nautical miles.

This seems to exceed the roughly 25 mile maximum range limit. Well, many other factors come in to play here. The first of which is the rapidly diminishing strength of the transmitted signal with distance. The power density of an electromagnetic wave is proportional to the inverse of the square of the distance from the source. So, for every 4 miles your signal travels, its strength is reduced by a factor of 16. It won't take too long for that 25 watt signal to reduce itself to next to nothing.

Best regards,

Mark

SM2K #275

www.creampuff.us

From: amelyachtowners@... [mailto:amelyachtowners@...] On Behalf Of markghayden@...
Sent: Thursday, March 20, 2014 9:56 AM
To: amelyachtowners@...
Subject: Re: [Amel Yacht Owners] ais antenna

Several years ago we installed AIS on Northfork. We initially used the existing AM/FM antenna and a year later had a VHF antenna that was designed for use with AIS professionally installed on the top of the main mast with a new run of coax to our nav station.

The difference was dramatic. The range increased from 10nm (with AM/FM antenna) to 50-100nm (with VHF/AIS antenna).

best, Mark

SM2K #331

On Thu, Mar 20, 2014 at 12:31 PM, wrote:

When I bought a Garmin AIS 600 ,I was told by the salesmen at the GPS store as well as a Garmin rep. that I should install a separate antenna . Now that I am ready to install it on top of the mizzen mast and thinking of the difficulty of the install, I am questioning if its worth the effort and the cost of the antenna. Putting a splitter into the vfh would be much easier. My question is for those that have a splitter , do you have a good AIS signal and is there any reason to have a separate antenna ?

  ; Thanks, Pat SM #123


Re: [Amel Yacht Owners] ais antenna

sailormon <kimberlite@...>
 

There is a hole in the top of the mizzen.

You only have to enlarge it a bit with a speedi bit.

After we mounted the antenna it took us ½ an hour to get the coax to the nav station.

Down the mast, out in the aft head. Remove the board above the doorway in the aft cabin and then into the ceiling above the mid ships bunk. Down in the forward cabinet in the mid ships cabin and into the Nav station.

Fair Winds

Eric

Kimberlite SM 376

 

 

From: amelyachtowners@... [mailto:amelyachtowners@...] On Behalf Of sailw32@...
Sent: Thursday, March 20, 2014 8:32 AM
To: amelyachtowners@...
Subject: [Amel Yacht Owners] ais antenna

 

 

When I bought a Garmin AIS 600 ,I was told by the salesmen at the GPS store as well as a Garmin rep. that I should install a separate antenna . Now that I am ready to install it on top of the mizzen mast and thinking of the difficulty of the install, I am questioning if its worth the effort and the cost of the antenna. Putting a splitter into the vfh would be much easier. My question  is for those that have a splitter , do you have a good AIS signal and is there any reason to have a separate antenna ?

                                                                                                Thanks, Pat SM #123


Re: Low revs/Volvo TMD22 /auto prop

Dimitris Krassopoulos <dkra@...>
 

 

 

Dimitris Krasopoulos

Mob.6944302318

 


Dometic Dishwasher DW2440- Amel54

Dimitris Krassopoulos <dkra@...>
 

The dishwasher on my Amel 54 stopped working. The panel lights turned off and I hear a pump working but the dishwasher is not working. Had somebody of the Amel 54 the same problem? Is there a solution to that?

 

Regards

 

Alma Libre Too

Amel 54

 

Dimitris Krasopoulos

Mob.6944302318

 


Re: RE ais antenna

john martin <symoondog@...>
 

I deleted it, and it still came up. I'm trying again.  John
 

To: amelyachtowners@...
From: symoondog@...
Date: Thu, 20 Mar 2014 20:56:11 +0000
Subject: [Amel Yacht Owners] RE ais antenna

 
Please... Could every one take a second to delete [amel yacht owners] from the subject line before replying.  John
 

To: amelyachtowners@...
From: yahoogroups@...
Date: Thu, 20 Mar 2014 12:50:30 +0000
Subject: Re: [Amel Yacht Owners] ais antenna

 
Pat, I thought that bird cage thing was a TV antenna, but maybe it was a combo TV and AM/FM Radio that Amel used if you bought the TV option. BeBe did not have that antenna or the TV option...so AIS was easy for me.

Sorry my suggestion does not work for you.

Bill
BeBe 387


On Thu, Mar 20, 2014 at 12:47 PM, Patrick Mcaneny <sailw32@...> wrote:
 


Bill, My radio antenna is not original, it a power amplified antenna installed on my mizzen. When I dropped my main mast to rerig and paint the mast I took off a cage-like contraption that  I figured was some sort of antenna.  Pat


-----Original Message-----
From: Bill & Judy Rouse <yahoogroups@...>
To: amelyachtowners <amelyachtowners@...>
Sent: Thu, Mar 20, 2014 8:40 am
Subject: Re: [Amel Yacht Owners] ais antenna

 
Let me give you another alternative:
Disconnect the AM/FM radio antenna at the back of the radio and either cut the connector off and place the correct connector for your AIR transponder. This is what I did nad it works perfect. I am guessing that Amel used a Marine VHF antenna for the AM/FM antenna on BeBe...they look identical at the top of the mast. I still get local FM reception without an antenna, but you can buy a short rubber car radio antenna and place it inside the cabinet where the radio is located.

Bill
BeBe


On Thu, Mar 20, 2014 at 12:31 PM, <sailw32@...> wrote:
 
When I bought a Garmin AIS 600 ,I was told by the salesmen at the GPS store as well as a Garmin rep. that I should install a separate antenna . Now that I am ready to install it on top of the mizzen mast and thinking of the difficulty of the install, I am questioning if its worth the effort and the cost of the antenna. Putting a splitter into the vfh would be much easier. My question  is for those that have a splitter , do you have a good AIS signal and is there any reason to have a separate antenna ?
                                                                           &nbsp ;                    Thanks, Pat SM #123






RE ais antenna

john martin <symoondog@...>
 

Please... Could every one take a second to delete [amel yacht owners] from the subject line before replying.  John
 

To: amelyachtowners@...
From: yahoogroups@...
Date: Thu, 20 Mar 2014 12:50:30 +0000
Subject: Re: [Amel Yacht Owners] ais antenna

 
Pat, I thought that bird cage thing was a TV antenna, but maybe it was a combo TV and AM/FM Radio that Amel used if you bought the TV option. BeBe did not have that antenna or the TV option...so AIS was easy for me.

Sorry my suggestion does not work for you.

Bill
BeBe 387


On Thu, Mar 20, 2014 at 12:47 PM, Patrick Mcaneny <sailw32@...> wrote:
 


Bill, My radio antenna is not original, it a power amplified antenna installed on my mizzen. When I dropped my main mast to rerig and paint the mast I took off a cage-like contraption that  I figured was some sort of antenna.  Pat


-----Original Message-----
From: Bill & Judy Rouse <yahoogroups@...>
To: amelyachtowners <amelyachtowners@...>
Sent: Thu, Mar 20, 2014 8:40 am
Subject: Re: [Amel Yacht Owners] ais antenna

 
Let me give you another alternative:
Disconnect the AM/FM radio antenna at the back of the radio and either cut the connector off and place the correct connector for your AIR transponder. This is what I did nad it works perfect. I am guessing that Amel used a Marine VHF antenna for the AM/FM antenna on BeBe...they look identical at the top of the mast. I still get local FM reception without an antenna, but you can buy a short rubber car radio antenna and place it inside the cabinet where the radio is located.

Bill
BeBe


On Thu, Mar 20, 2014 at 12:31 PM, <sailw32@...> wrote:
 
When I bought a Garmin AIS 600 ,I was told by the salesmen at the GPS store as well as a Garmin rep. that I should install a separate antenna . Now that I am ready to install it on top of the mizzen mast and thinking of the difficulty of the install, I am questioning if its worth the effort and the cost of the antenna. Putting a splitter into the vfh would be much easier. My question  is for those that have a splitter , do you have a good AIS signal and is there any reason to have a separate antenna ?
                                                                           &nbsp ;                    Thanks, Pat SM #123





Re: ais antenna

Gaffney, Drew <drew.gaffney@...>
 

We had an SR-161 AIS receiver that got excellent reception from the FM Radio antenna and from the ?triac, (the unused cable behind the nav station.  We then bought an AMEC Camino 101 Class B transponder from Milltechmarine and were advised to use either a VHF antenna splitter or a dedicated AIS antenna, as the new transponder would not transmit with that antenna.

.  I installed a Shakespeare AIS ¼ wave AIS antenna, Mfg # 5215-AIS on the mizzen.  It was fairly easy as there are pull-lines in the mizzen and I’d already run the coax from the aft head access to the nav station.

Reception was good but transmission was terrible.  I was told by Milltech that because the AIS antenna was <1m from the other antenna, that I’d need to move it.  The local electronics installer said that there must be some other problem.  We’ll address this when we’re back on the boat in Saldanha ZA in June…

The AIS transponder requires either a dedicated AIS antenna or a splitter. Apparently, it measures SWR and will not transmit if it’s above some limit (it’s not listed in the manual…)

We already use an amplifier/splitter for our FM radio antenna to allow iPod input, so cannot use that antenna for the AIS.

Having AIS has been very helpful.  You’ll like having it.

Drew

SY Revelation SM390
Lying Saldanha, ZA

 


Re: [Amel Yacht Owners] ais antenna

Patrick McAneny
 

Mark, The GPS store mentioned a loss in the range of 2db., I could not understand why you would have any loss at all assuming a good connection, but did not labor the point. I spoke with tech. rep at Shakespere  and he said both the vhf and ais would work ,but neither as well as having a dedicated antenna. Something to do with the bandwidth that the ais needs which is not available through a standard vhf antenna. I do not have a drop of Geek blood in me and this all makes my head ache. I think I will install the dedicated antenna and be done with it , I have ,can't return it, and can't eat it. Thanks, Pat


-----Original Message-----
From: Mark Erdos
To: amelyachtowners
Sent: Thu, Mar 20, 2014 11:16 am
Subject: RE: [Amel Yacht Owners] ais antenna

 
Pat,
 
For peace of mind for others on the forum, in theory there should be zero loss of signal strength (transmitting and receiving) with a splitter correctly installed. As long as the connections are pure the signal will not be effected. There is a very slight loss based on the length of the coax so, perhaps this was what they meant. However, the loss due to the added coax would be so minimal that I seriously doubt if it could be measured.
 
Either installation will give you the results you need.
 
Best regards,
 
Mark
 
SM2K #275
www.creampuff.us
 
 
 
From: amelyachtowners@... [mailto:amelyachtowners@...] On Behalf Of Patrick Mcaneny
Sent: Thursday, March 20, 2014 10:43 AM
To: amelyachtowners@...
Subject: Re: [Amel Yacht Owners] ais antenna
 
 
 
Just got confirmation from the GPS store that after talking to Garmin they decided , yes you can trans and receive from existing vhf antenna , but there would be a loss in signal strength and still recommended a separate antenna. Since they won't do a return pass 30 days I may install it . Pat
 
-----Original Message-----
From: Bill & Judy Rouse <yahoogroups@...>
To: amelyachtowners <amelyachtowners@...>
Sent: Thu, Mar 20, 2014 10:28 am
Subject: Re: [Amel Yacht Owners] ais antenna
 
Thanks for that Mark. I knew 25 miles mast-to-mast, and once upon a time I did the math, but forgot the math and remember the 25.
 
From time-to-time there are anomalies in VHF which cause it to bounce. We saw such an occasion sailing between Darwin and Bali...amazingly we had AIS targets 600 miles from our position and had Darwin VHF verbal traffic the same distance...it was freaky!
 
Bill
BeBe 387 
 
On Thu, Mar 20, 2014 at 2:08 PM, Mark Erdos <mcerdos@...> wrote:
 
Mark,

I think you need to check your AIS. If you are showing vessels 50-100nm away, these are most likely ghost images or images where you have not received a transmission for quite some time. The should not be on the screen. The AIS works on a VHF frequency. This is a direct line of sight transmission. Meaning, that both the transmitting antenna and the receiving antenna need to “see” each other. Due to the curvature of the earth this limits the transmission range. The maximum range of a VHF transmission is 25 nm.

The range in nautical miles - that is, how far your radio can 'see' to the horizon is equal to 1.23 times the square root of the height of your antenna in feet.

http://www.frugal-mariner.com/images/Range2.png

So if, for instance your antenna height is 60 feet, the distance it can transmit before it runs into the horizon is ~ 9.5 nautical miles. ( the square root of 60 = 7.74. Multiply that times 1.23 to come up with approximately 9.5.)

Now, keep in mind, the vessel to which you are transmitting also has his antenna above the water. So, let's assume, for example, his antenna is 18 feet above the water. He can transmit about 5.2 miles. You can add your range to his to come up with 14.7 nautical miles.

A land based station is usually much higher. An antenna on a hill on a tower might be very high, but for argument's sake, let's say it's 400 feet. So theoretically, he can transmit 24.6 miles. Add that to your 9.5 miles and you have about 34.1 nautical miles.

This seems to exceed the roughly 25 mile maximum range limit. Well, many other factors come in to play here. The first of which is the rapidly diminishing strength of the transmitted signal with distance. The power density of an electromagnetic wave is proportional to the inverse of the square of the distance from the source. So, for every 4 miles your signal travels, its strength is reduced by a factor of 16. It won't take too long for that 25 watt signal to reduce itself to next to nothing.

Best regards,

Mark

SM2K #275

www.creampuff.us
From: amelyachtowners@... [mailto:amelyachtowners@...] On Behalf Of markghayden@...
Sent: Thursday, March 20, 2014 9:56 AM
To: amelyachtowners@...

Subject: Re: [Amel Yacht Owners] ais antenna
Several years ago we installed AIS on Northfork. We initially used the existing AM/FM antenna and a year later had a VHF antenna that was designed for use with AIS professionally installed on the top of the main mast with a new run of coax to our nav station.

The difference was dramatic. The range increased from 10nm (with AM/FM antenna) to 50-100nm (with VHF/AIS antenna).

best, Mark

SM2K #331

On Thu, Mar 20, 2014 at 12:31 PM, <sailw32@...> wrote:

When I bought a Garmin AIS 600 ,I was told by the salesmen at the GPS store as well as a Garmin rep. that I should install a separate antenna . Now that I am ready to install it on top of the mizzen mast and thinking of the difficulty of the install, I am questioning if its worth the effort and the cost of the antenna. Putting a splitter into the vfh would be much easier. My question is for those that have a splitter , do you have a good AIS signal and is there any reason to have a separate antenna ?
&nbsp ; Thanks, Pat SM #123